<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div class="headtitle">
        <img src="../assets/logo.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside width="isCollapse ? '64px' : '200px' ">
        <div class="toggle-button" @click="toggleCollapse">
          |||
        </div>
        <!-- 侧边栏菜单区域 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="`${item.id}`" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
              <!-- 二级菜单 -->
              <el-menu-item :index="`/${subItem.path}`" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState(`/${subItem.path}`)">
              <template slot="title">
              <!-- 图标 -->
              <i class="el-icon-menu"></i>
              <!-- 文本 -->
              <span>{{subItem.authName}}</span>
            </template>
              </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
    //左侧菜单数据
    menulist:[],
    iconsObj:{
      '125':'iconfont icon-user',
      '103':'iconfont icon-tijikongjian',
      '101':'iconfont icon-shangpin',
      '102':'iconfont icon-danju',
      '145':'iconfont icon-baobiao',
    },
    //是否折叠
    isCollapse:false,
    //被激活的链接地址
    activePath:''
    }
  },
  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取所有的菜单
    async getMenuList(){
      const {data:res} = await this.$http.get
      ('menus')
      if(res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      //console.log(res)
    },
    //点击按钮,切换菜单的折叠与展开
    toggleCollapse(){
     this.isCollapse = ! this.isCollapse;
    },
    //保存链接的激活状态
    saveNavState(activePath){
     window.sessionStorage.setItem('activePath',activePath)
     this.activePath = activePath
    } 
  }
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
    img {
      width: 56px;
    }
  }
}

.el-aside {
  background-color: #373d44;
  .el-menu{
    border-right: 0;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #4a5064;
  text-align: center;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  letter-spacing: 0.2rem;
  cursor: pointer;
}
</style>
